V12 discloses 25 x402 SDK flaws, including three critical ones that let malicious APIs drain AI agent wallets
Security firm V12 reported on October 22 that the x402 SDKs, an open standard for AI agents paying for API calls over HTTP 402, contained 25 flaws, three rated critical. The most notable was that the default client set no spending limit, so a malicious API could get an agent with an automatic signer to sign a payment for its full balance …